1 files changed, 116 insertions, 0 deletions
diff --git a/tests/tools/changes.test.py b/tests/tools/changes.test.py
new file mode 100644
index 0000000..7eeb777
--- /dev/null
+++ b/tests/tools/changes.test.py
@@ -0,0 +1,116 @@
+"""Tests for the ``changes/`` fragment generator in ``tools/changes.py``."""
+
+import importlib.util
+from pathlib import Path
+
+_REPO_ROOT = Path(__file__).parent.parent.parent
+_GENERATOR_PATH = _REPO_ROOT / "tools" / "changes.py"
+
+
+def _load_generator():
+    spec = importlib.util.spec_from_file_location("edify_changes_tool", _GENERATOR_PATH)
+    assert spec is not None
+    assert spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+_GENERATOR = _load_generator()
+
+
+def _write_fragment(directory: Path, name: str, body: str) -> Path:
+    fragment_path = directory / name
+    fragment_path.write_text(body, encoding="utf-8")
+    return fragment_path
+
+
+def test_collect_fragments_returns_files_in_fragment_id_order(tmp_path):
+    _write_fragment(tmp_path, "0020-second.rst", "[change]\nanchor=b\nheading=B\ncontext=b")
+    _write_fragment(tmp_path, "0010-first.rst", "[change]\nanchor=a\nheading=A\ncontext=a")
+    collected = _GENERATOR.collect_fragments(tmp_path)
+    assert [path.name for path in collected] == ["0010-first.rst", "0020-second.rst"]
+
+
+def test_collect_fragments_skips_the_readme(tmp_path):
+    _write_fragment(tmp_path, "README.rst", "not a fragment")
+    _write_fragment(tmp_path, "0010-only.rst", "[change]\nanchor=a\nheading=A\ncontext=a")
+    collected = _GENERATOR.collect_fragments(tmp_path)
+    assert [path.name for path in collected] == ["0010-only.rst"]
+
+
+def test_render_fragment_emits_anchor_heading_and_context(tmp_path):
+    fragment_path = _write_fragment(
+        tmp_path,
+        "0010-example.rst",
+        "[change]\nanchor = my-anchor\nheading = My Heading\ncontext = A single sentence.",
+    )
+    rendered = _GENERATOR.render_fragment(fragment_path)
+    assert ".. _my-anchor:" in rendered
+    assert "My Heading" in rendered
+    assert "-" * len("My Heading") in rendered
+    assert "A single sentence." in rendered
+
+
+def test_render_fragment_collapses_multiline_context_into_one_paragraph(tmp_path):
+    fragment_path = _write_fragment(
+        tmp_path,
+        "0010-multiline.rst",
+        "[change]\nanchor = a\nheading = H\ncontext = first line\n    second line",
+    )
+    rendered = _GENERATOR.render_fragment(fragment_path)
+    assert "first line second line" in rendered
+
+
+def test_render_fragment_includes_before_after_block_when_both_present(tmp_path):
+    fragment_path = _write_fragment(
+        tmp_path,
+        "0010-beforeafter.rst",
+        "[change]\nanchor = a\nheading = H\nbefore = old\nafter = new\ncontext = changed",
+    )
+    rendered = _GENERATOR.render_fragment(fragment_path)
+    assert ".. code-block:: text" in rendered
+    assert "    old" in rendered
+    assert "    new" in rendered
+
+
+def test_render_fragment_omits_before_after_block_when_absent(tmp_path):
+    fragment_path = _write_fragment(
+        tmp_path,
+        "0010-nofix.rst",
+        "[change]\nanchor = a\nheading = H\ncontext = no before/after here",
+    )
+    rendered = _GENERATOR.render_fragment(fragment_path)
+    assert ".. code-block:: text" not in rendered
+
+
+def test_render_all_concatenates_every_fragment_in_order(tmp_path):
+    _write_fragment(tmp_path, "0020-b.rst", "[change]\nanchor=b\nheading=Bravo\ncontext=b")
+    _write_fragment(tmp_path, "0010-a.rst", "[change]\nanchor=a\nheading=Alpha\ncontext=a")
+    rendered = _GENERATOR.render_all(tmp_path)
+    assert rendered.index("Alpha") < rendered.index("Bravo")
+
+
+def test_main_release_deletes_consumed_fragments(tmp_path, monkeypatch):
+    _write_fragment(tmp_path, "0010-a.rst", "[change]\nanchor=a\nheading=A\ncontext=a")
+    monkeypatch.setattr(_GENERATOR, "_CHANGES_DIR", tmp_path)
+    exit_code = _GENERATOR.main(["--release"])
+    assert exit_code == 0
+    assert _GENERATOR.collect_fragments(tmp_path) == []
+
+
+def test_main_without_release_leaves_fragments_in_place(tmp_path, monkeypatch, capsys):
+    _write_fragment(tmp_path, "0010-a.rst", "[change]\nanchor=a\nheading=A\ncontext=a")
+    monkeypatch.setattr(_GENERATOR, "_CHANGES_DIR", tmp_path)
+    exit_code = _GENERATOR.main([])
+    captured = capsys.readouterr()
+    assert exit_code == 0
+    assert "A" in captured.out
+    assert len(_GENERATOR.collect_fragments(tmp_path)) == 1
+
+
+def test_committed_changes_directory_fragments_all_parse():
+    changes_dir = _REPO_ROOT / "changes"
+    for fragment_path in _GENERATOR.collect_fragments(changes_dir):
+        rendered = _GENERATOR.render_fragment(fragment_path)
+        assert rendered.strip() != ""